Nutritionally, it is important to try and eat little and often, and include protein with every meal or snack, which helps to balance blood sugar and prevents an empty stomach. Protein shakes can be useful for this if eating solid food is really difficult. Identifying and avoiding foods or odours that trigger nausea can help to ease symptoms; these can include rich, spicy or fried foods, caffeine, and smells from perfume or aftershaves. Try and let someone else do the cooking if you are unable cope with the smell of food.
Ginger can help to relieve sickness and can be used in various forms, such as ginger tea, adding to a fresh juice, adding to cooking or a good quality natural ginger ale (when sipped slowly – use a straw). Dry crackers or plain toast can help to settle the stomach, particularly first thing in the morning and it is worth keeping some plain snacks in your bag as well.
If taking any nutritional supplements be mindful of taking them at a time of day when you are not feeling nauseous or perhaps consider a using liquid form which will be more easily absorbed.